Encoding – Scan Type - AWS Elemental Server

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Encoding – Scan Type

Description

The scan type of content can affect the video quality. The following are the settings and internal algorithms tied to the scan type:

  • The encoding controls that deal with scan type are dealt with in Image Processing – Scan Type – Key Controls.

  • Picture Adaptive Field Frame (PAFF): This control is automatically enabled on Graphics Processing Unit (GPU)-enabled versions of the software and automatically disabled on Central Processing Unit (CPU)-only versions.

  • Macroblock Adaptive Field Frame (MBAFF): This control is automatically enabled on CPU-only versions of the software and automatically disabled on GPU-enabled versions.

  • Force Field Pictures: This field appears only if the codec is H.264 and only affects GPU-enabled versions of the software.

    • Enabled: All outputs are forced to use PAFF field picture encoding.

    • Disabled: The encoder switches between PAFF and MBAFF, depending on the content.

Recommendations

  • Force Field Pictures results in a significant reduction in quality so it should only be used if required for compatibility with specific decoders or playback devices.

Location of Fields

Location of Field on Web Interface Location of Tag in XML
Streams – Video > Advanced > Force Field Pictures

stream_assembly/video_description/codec/force_field_pictures

where codec is:

h264_settings